SITE: ACE-1c
PRIORITY: 1
POSITION: 9°35.117 'S, 151°34.424'E
WATER DEPTH: 2307 m
SEDIMENT THICKNESS: 950 m
TOTAL PENETRATION: 1030 m
SEISMIC COVERAGE: EW9510-1366 (WW01 CMP 4547) and -1381 (WW13 CMP 1681)
Objectives: Determine (1) sedimentology, biostratigraphy, and vertical motion history of the northern margin;
(2) nature of basement and the pre-rift history; and (3) basement stress orientation, permeability, temperature, physical properties, and fluid composition.
Drilling Program: APC, XCB, RCB.
Logging and Downhole Operations: Triple-combo, FMS, GHMT, BHTV in basement.
Nature of Rock Anticipated: Quaternary hemipelagic sediments, Paleogene volcanics and volcaniclastics.
SITE: ACE-3c
PRIORITY: 1
POSITION: 9°47.61'S, 151°34.50 'E
WATER DEPTH: 420 m
SEDIMENT THICKNESS: 300 m
TOTAL PENETRATION: 500 m
SEISMIC COVERAGE: EW9510-1366 (WW01 CMP 6390)
Objectives: Determine internal structure and composition of Moresby Seamount including the nature of basement (rock type, P-T-t, structural fabric, and deformation history).
Drilling Program: APC, XCB, RCB.
Logging and Downhole Operations: Triple-combo, FMS, GHMT, BHTV in basement.
Nature of Rock Anticipated: 6 m Holocene carbonate sand; Quaternary sandstone, siltstone and mudstone; greenschist facies metamorphics.
SITE: ACE-7b
PRIORITY: 1
POSITION: 9°27.327 'S, 151°34.396 'E
WATER DEPTH: 2115 m
SEDIMENT THICKNESS: 750 m
TOTAL PENETRATION: 750 m
SEISMIC COVERAGE: EW9510-1366 (WW01 CMP 3399) and -1370 (WW4a CMP 1208)
Objectives: Determine (1) sedimentology, biostratigraphy, and vertical motion history of the northern margin, and (2) nature of the forearc basin sequence and the pre-rift history.
Drilling Program: APC, XCB, RCB.
Logging and Downhole Operations: Triple-combo, FMS, GHMT.
Nature of Rock Anticipated: 640 m Pliocene-Quaternary hemipelagic sediments above 110 m Miocene forearc basin sediments (sandstone, siltstone, and mudstone).
SITE: ACE-8a
PRIORITY: 1
POSITION: 9°44.71'S, 151°37.52 'E
WATER DEPTH: 3175 m
SEDIMENT THICKNESS: 900 m
TOTAL PENETRATION: 1200 m
SEISMIC COVERAGE: EW9510-1374 (WW08 CMP 1500)
Objectives: Determine (1) sedimentology, biostratigraphy, structural fabric and vertical motion history in the rift graben, (2) nature of basement (P-T-t, structural fabric, deformation history) in and below fault zone, and (3) in situ stress, permeability, temperature, physical properties, fluid pressure, and composition.
Drilling Program: APC, XCB, RCB, Reentry and triple casing.
Logging and Downhole Operations: Triple-combo, FMS, GHMT, BHTV in basement, ASI VSP, packer experiments.
Nature of Rock Anticipated: Quaternary hemipelagic sediments, sheared fault zone rocks, metamorphics.
SITE: ACE-9a
PRIORITY: 2
POSITION: 9°30.387 'S, 151°34.393 'E
WATER DEPTH: 2211 m
SEDIMENT THICKNESS: 1000 m
TOTAL PENETRATION: 1000
SEISMIC COVERAGE: EW9510-1366 (WW01 CMP 3850) & -1379 (WW11 CMP 1624)
Objectives: Determine (1) sedimentology, biostratigraphy, and vertical motion history of the northern margin,
(2) nature of the forearc basin sequence and the pre-rift history.
Drilling Program: APC, XCB, RCB.
Logging and Downhole Operations: Triple-combo, FMS, GHMT.
Nature of Rock Anticipated: 780 m Pliocene-Quaternary hemipelagic sediments above 220 m Miocene forearc basin sediments (sandstone, siltstone, and mudstone).